Particle size distribution measuring apparatus

Details Particle size distribution measuring apparatus Particle size distribution measuring apparatus

2005-11-29

2005-11-29

Pham, Hoa Q. (Department: 2877)

Optics: measuring and testing

For size of particles

By particle light scattering

C356S343000

Reexamination Certificate

active

06970243

ABSTRACT:
A particle size distribution measuring apparatus which can enhance the precision and the reliability of measurements by eliminating the region of the particle size having inferior measuring precision and resolution is disclosed.In one embodiment, the particle size distribution measuring apparatus has a cell for receiving particles, a light source section for irradiating laser lights with a plurality of wavelengths to the cell, a detector for measuring the intensity of a direct light passing through the cell and the scattered lights at a plurality of scattering angles, and an arithmetic processing section which determines the particle size distribution by using the laser light of one wavelengths for the region of the particle size having low sensitivity at another wavelength in the whole range of the particle size to be measured to compensate the sensitivity of the region.

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